Condition Setting for 2-Point Control
When using 2-point control, the controller compares the actual temperature and the setpoint temperature as follows:
Cooling
Temperature difference = Actual temperature – Setpoint temperature
Heating
Temperature difference = Setpoint temperature – Actual temperature
Temperature difference setting
Temperature difference OFF ↔ speed 1
Temperature difference ≥ Set temperature difference → Fan speed = 1
Temperature difference < Set temperature difference → Fan turns off
Temperature difference 1 ↔ speed 2
Temperature difference ≥ Set temperature difference → Fan speed = 2
Temperature difference < Set temperature difference → Fan speed 1
Temperature difference 2 ↔ speed 3
Temperature difference ≥ Set temperature difference → Fan speed = 3
Temperature difference < Set temperature difference → Fan speed 2
Temperature difference hysteresis
You can set the hysteresis value of the temperature difference (0 = no hysteresis). Once the temperature difference is greater than the defined temperature difference and hysteresis, the fan switches the speed.
Minimum time in fan speed
You can set a minimum time for the fan to stay at speed when the fan speed is controlled automatically.
Example
|
Parameter |
Setting |
|---|---|
|
Hysteresis temperature difference |
+/– 0,5 |
|
Temperature difference |
1 |
|
Upper temperature difference limit |
1 + 0,5 = 1,5 |
|
Lower temperature difference limit |
1 – 0,5 = 0,5 |
If the control value is between 1,5 and 0,5 → no change
Control value ≥ 1,5 / < 0,5 → change of speed / fan off